./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:38:08,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:38:08,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:38:08,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:38:08,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:38:08,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:38:08,416 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:38:08,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:38:08,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:38:08,426 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:38:08,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:38:08,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:38:08,431 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:38:08,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:38:08,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:38:08,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:38:08,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:38:08,444 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:38:08,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:38:08,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:38:08,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:38:08,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:38:08,457 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:38:08,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:38:08,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:38:08,468 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:38:08,468 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:38:08,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:38:08,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:38:08,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:38:08,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:38:08,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:38:08,475 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:38:08,476 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:38:08,479 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:38:08,479 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:38:08,480 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:38:08,480 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:38:08,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:38:08,481 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:38:08,482 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:38:08,483 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 10:38:08,519 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:38:08,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:38:08,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:38:08,523 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:38:08,524 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:38:08,524 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:38:08,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:38:08,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:38:08,525 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:38:08,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:38:08,527 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:38:08,527 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:38:08,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:38:08,528 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:38:08,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:38:08,528 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:38:08,528 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:38:08,529 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:38:08,529 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:38:08,529 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:38:08,529 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:38:08,530 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:38:08,530 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:38:08,530 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:38:08,531 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:38:08,531 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:38:08,531 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:38:08,531 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:38:08,532 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:38:08,533 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:38:08,533 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ce97f399f5ab540e05119d9433f4e1bfecfe892f8e87faddc6435387a55a4d6 [2022-11-20 10:38:08,830 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:38:08,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:38:08,873 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:38:08,874 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:38:08,875 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:38:08,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-11-20 10:38:11,862 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:38:12,172 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:38:12,173 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i [2022-11-20 10:38:12,196 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/data/8ef38d7f4/7758f8ce5e7049bbbb945b59c172c710/FLAG9e27f3e41 [2022-11-20 10:38:12,214 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/data/8ef38d7f4/7758f8ce5e7049bbbb945b59c172c710 [2022-11-20 10:38:12,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:38:12,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:38:12,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:38:12,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:38:12,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:38:12,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,227 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cb28285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12, skipping insertion in model container [2022-11-20 10:38:12,228 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,235 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:38:12,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:38:12,614 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2022-11-20 10:38:12,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:38:12,660 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:38:12,712 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/sv-benchmarks/c/goblint-regression/28-race_reach_22-deref_read_racefree.i[30176,30189] [2022-11-20 10:38:12,720 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:38:12,757 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:38:12,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12 WrapperNode [2022-11-20 10:38:12,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:38:12,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:38:12,759 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:38:12,759 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:38:12,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,797 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 68 [2022-11-20 10:38:12,798 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:38:12,799 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:38:12,799 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:38:12,799 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:38:12,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,822 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,822 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,834 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:38:12,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:38:12,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:38:12,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:38:12,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (1/1) ... [2022-11-20 10:38:12,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:38:12,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:12,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:38:12,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:38:12,924 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:38:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:38:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 10:38:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:38:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:38:12,925 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 10:38:12,926 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 10:38:12,926 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:38:12,926 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:38:12,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:38:12,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:38:12,933 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:38:13,067 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:38:13,069 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:38:13,429 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:38:13,437 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:38:13,437 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-20 10:38:13,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:38:13 BoogieIcfgContainer [2022-11-20 10:38:13,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:38:13,442 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:38:13,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:38:13,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:38:13,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:38:12" (1/3) ... [2022-11-20 10:38:13,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1caffa31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:38:13, skipping insertion in model container [2022-11-20 10:38:13,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:38:12" (2/3) ... [2022-11-20 10:38:13,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1caffa31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:38:13, skipping insertion in model container [2022-11-20 10:38:13,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:38:13" (3/3) ... [2022-11-20 10:38:13,450 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_22-deref_read_racefree.i [2022-11-20 10:38:13,477 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:38:13,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-20 10:38:13,478 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:38:13,598 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:38:13,650 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 10:38:13,672 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 122 transitions, 249 flow [2022-11-20 10:38:13,677 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 122 transitions, 249 flow [2022-11-20 10:38:13,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 122 transitions, 249 flow [2022-11-20 10:38:13,801 INFO L130 PetriNetUnfolder]: 14/163 cut-off events. [2022-11-20 10:38:13,801 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:38:13,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 163 events. 14/163 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 458 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 86. Up to 4 conditions per place. [2022-11-20 10:38:13,815 INFO L119 LiptonReduction]: Number of co-enabled transitions 3760 [2022-11-20 10:38:18,349 INFO L134 LiptonReduction]: Checked pairs total: 7999 [2022-11-20 10:38:18,349 INFO L136 LiptonReduction]: Total number of compositions: 113 [2022-11-20 10:38:18,357 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 46 transitions, 97 flow [2022-11-20 10:38:18,399 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 354 states, 277 states have (on average 2.96028880866426) internal successors, (820), 353 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,425 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:18,432 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3d69d44e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:18,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-20 10:38:18,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 354 states, 277 states have (on average 2.96028880866426) internal successors, (820), 353 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:38:18,440 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:18,441 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:38:18,441 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 10:38:18,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:18,446 INFO L85 PathProgramCache]: Analyzing trace with hash 15003, now seen corresponding path program 1 times [2022-11-20 10:38:18,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:18,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364032724] [2022-11-20 10:38:18,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:18,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:18,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:18,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364032724] [2022-11-20 10:38:18,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364032724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:18,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:18,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:38:18,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035009869] [2022-11-20 10:38:18,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:18,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:18,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:18,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:18,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:18,737 INFO L87 Difference]: Start difference. First operand has 354 states, 277 states have (on average 2.96028880866426) internal successors, (820), 353 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:18,875 INFO L93 Difference]: Finished difference Result 301 states and 554 transitions. [2022-11-20 10:38:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:18,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:38:18,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:18,898 INFO L225 Difference]: With dead ends: 301 [2022-11-20 10:38:18,899 INFO L226 Difference]: Without dead ends: 299 [2022-11-20 10:38:18,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:18,905 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:18,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 4 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:18,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-20 10:38:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-11-20 10:38:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 246 states have (on average 2.2357723577235773) internal successors, (550), 298 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 550 transitions. [2022-11-20 10:38:18,989 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 550 transitions. Word has length 2 [2022-11-20 10:38:18,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:18,989 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 550 transitions. [2022-11-20 10:38:18,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:18,990 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 550 transitions. [2022-11-20 10:38:18,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:38:18,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:18,991 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:38:18,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:38:18,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 10:38:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash 15004, now seen corresponding path program 1 times [2022-11-20 10:38:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:18,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184253041] [2022-11-20 10:38:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:18,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:19,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:19,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184253041] [2022-11-20 10:38:19,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184253041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:19,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:19,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:38:19,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129865291] [2022-11-20 10:38:19,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:19,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:19,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:19,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:19,215 INFO L87 Difference]: Start difference. First operand 299 states and 550 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:19,295 INFO L93 Difference]: Finished difference Result 288 states and 539 transitions. [2022-11-20 10:38:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:19,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:38:19,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:19,302 INFO L225 Difference]: With dead ends: 288 [2022-11-20 10:38:19,302 INFO L226 Difference]: Without dead ends: 288 [2022-11-20 10:38:19,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:19,304 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:19,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:19,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-20 10:38:19,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-11-20 10:38:19,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 240 states have (on average 2.245833333333333) internal successors, (539), 287 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:19,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 539 transitions. [2022-11-20 10:38:19,332 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 539 transitions. Word has length 2 [2022-11-20 10:38:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:19,332 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 539 transitions. [2022-11-20 10:38:19,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:19,335 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 539 transitions. [2022-11-20 10:38:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-20 10:38:19,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:19,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-20 10:38:19,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:38:19,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 10:38:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:19,337 INFO L85 PathProgramCache]: Analyzing trace with hash 447253275, now seen corresponding path program 1 times [2022-11-20 10:38:19,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:19,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692952192] [2022-11-20 10:38:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:19,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:19,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:19,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:19,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692952192] [2022-11-20 10:38:19,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692952192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:19,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794716409] [2022-11-20 10:38:19,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:19,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:19,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:19,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:19,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:38:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:19,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:38:19,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:19,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:38:19,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:19,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:19,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794716409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:19,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:19,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-20 10:38:19,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440877781] [2022-11-20 10:38:19,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:19,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:38:19,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:38:19,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:38:19,902 INFO L87 Difference]: Start difference. First operand 288 states and 539 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:20,015 INFO L93 Difference]: Finished difference Result 75 states and 125 transitions. [2022-11-20 10:38:20,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:20,016 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-20 10:38:20,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:20,016 INFO L225 Difference]: With dead ends: 75 [2022-11-20 10:38:20,017 INFO L226 Difference]: Without dead ends: 75 [2022-11-20 10:38:20,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:38:20,018 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 110 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:20,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 27 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:20,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-20 10:38:20,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-11-20 10:38:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 68 states have (on average 1.838235294117647) internal successors, (125), 74 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 125 transitions. [2022-11-20 10:38:20,022 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 125 transitions. Word has length 5 [2022-11-20 10:38:20,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:20,023 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 125 transitions. [2022-11-20 10:38:20,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:20,023 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 125 transitions. [2022-11-20 10:38:20,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:38:20,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:20,024 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-20 10:38:20,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:20,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:20,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-20 10:38:20,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:20,231 INFO L85 PathProgramCache]: Analyzing trace with hash 979949902, now seen corresponding path program 1 times [2022-11-20 10:38:20,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:20,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001207784] [2022-11-20 10:38:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:20,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:20,260 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:38:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:20,294 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:38:20,294 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:38:20,295 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (22 of 23 remaining) [2022-11-20 10:38:20,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-11-20 10:38:20,297 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-11-20 10:38:20,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-11-20 10:38:20,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-11-20 10:38:20,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (17 of 23 remaining) [2022-11-20 10:38:20,298 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 23 remaining) [2022-11-20 10:38:20,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-11-20 10:38:20,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-11-20 10:38:20,299 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 23 remaining) [2022-11-20 10:38:20,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 23 remaining) [2022-11-20 10:38:20,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 23 remaining) [2022-11-20 10:38:20,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-11-20 10:38:20,300 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-11-20 10:38:20,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 23 remaining) [2022-11-20 10:38:20,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 23 remaining) [2022-11-20 10:38:20,301 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-11-20 10:38:20,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-11-20 10:38:20,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-11-20 10:38:20,304 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-11-20 10:38:20,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 23 remaining) [2022-11-20 10:38:20,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-11-20 10:38:20,305 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-11-20 10:38:20,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:38:20,308 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 10:38:20,310 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:38:20,310 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 10:38:20,337 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:38:20,349 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 10:38:20,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 152 places, 163 transitions, 338 flow [2022-11-20 10:38:20,351 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 152 places, 163 transitions, 338 flow [2022-11-20 10:38:20,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 163 transitions, 338 flow [2022-11-20 10:38:20,438 INFO L130 PetriNetUnfolder]: 24/250 cut-off events. [2022-11-20 10:38:20,441 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-20 10:38:20,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 250 events. 24/250 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 855 event pairs, 0 based on Foata normal form. 0/189 useless extension candidates. Maximal degree in co-relation 164. Up to 6 conditions per place. [2022-11-20 10:38:20,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 10800 [2022-11-20 10:38:25,330 INFO L134 LiptonReduction]: Checked pairs total: 26494 [2022-11-20 10:38:25,331 INFO L136 LiptonReduction]: Total number of compositions: 152 [2022-11-20 10:38:25,332 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 63 places, 73 transitions, 158 flow [2022-11-20 10:38:25,578 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7553 states, 6838 states have (on average 3.9243930973968997) internal successors, (26835), 7552 states have internal predecessors, (26835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:25,581 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3d69d44e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:25,581 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2022-11-20 10:38:25,621 INFO L276 IsEmpty]: Start isEmpty. Operand has 7553 states, 6838 states have (on average 3.9243930973968997) internal successors, (26835), 7552 states have internal predecessors, (26835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:38:25,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:25,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:38:25,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:25,627 INFO L85 PathProgramCache]: Analyzing trace with hash 26421, now seen corresponding path program 1 times [2022-11-20 10:38:25,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:25,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562483694] [2022-11-20 10:38:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:25,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:25,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:25,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:25,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:25,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562483694] [2022-11-20 10:38:25,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562483694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:25,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:25,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:38:25,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325779564] [2022-11-20 10:38:25,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:25,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:25,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:25,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:25,741 INFO L87 Difference]: Start difference. First operand has 7553 states, 6838 states have (on average 3.9243930973968997) internal successors, (26835), 7552 states have internal predecessors, (26835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:25,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:25,971 INFO L93 Difference]: Finished difference Result 6140 states and 17118 transitions. [2022-11-20 10:38:25,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:25,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:38:25,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:26,012 INFO L225 Difference]: With dead ends: 6140 [2022-11-20 10:38:26,013 INFO L226 Difference]: Without dead ends: 6130 [2022-11-20 10:38:26,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:26,014 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:26,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 21 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:26,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6130 states. [2022-11-20 10:38:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6130 to 6130. [2022-11-20 10:38:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6130 states, 5690 states have (on average 3.0035149384885766) internal successors, (17090), 6129 states have internal predecessors, (17090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6130 states to 6130 states and 17090 transitions. [2022-11-20 10:38:26,252 INFO L78 Accepts]: Start accepts. Automaton has 6130 states and 17090 transitions. Word has length 2 [2022-11-20 10:38:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:26,252 INFO L495 AbstractCegarLoop]: Abstraction has 6130 states and 17090 transitions. [2022-11-20 10:38:26,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 6130 states and 17090 transitions. [2022-11-20 10:38:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:38:26,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:26,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:38:26,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 10:38:26,254 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:26,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash 26422, now seen corresponding path program 1 times [2022-11-20 10:38:26,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:26,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806250303] [2022-11-20 10:38:26,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:26,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:26,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:26,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806250303] [2022-11-20 10:38:26,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806250303] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:26,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:26,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:38:26,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871385667] [2022-11-20 10:38:26,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:26,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:26,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:26,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:26,287 INFO L87 Difference]: Start difference. First operand 6130 states and 17090 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:26,510 INFO L93 Difference]: Finished difference Result 5787 states and 16118 transitions. [2022-11-20 10:38:26,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:26,510 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:38:26,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:26,551 INFO L225 Difference]: With dead ends: 5787 [2022-11-20 10:38:26,551 INFO L226 Difference]: Without dead ends: 5787 [2022-11-20 10:38:26,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:26,553 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:26,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 11 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5787 states. [2022-11-20 10:38:26,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5787 to 5787. [2022-11-20 10:38:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5787 states, 5404 states have (on average 2.9826054774241304) internal successors, (16118), 5786 states have internal predecessors, (16118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5787 states to 5787 states and 16118 transitions. [2022-11-20 10:38:26,762 INFO L78 Accepts]: Start accepts. Automaton has 5787 states and 16118 transitions. Word has length 2 [2022-11-20 10:38:26,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:26,762 INFO L495 AbstractCegarLoop]: Abstraction has 5787 states and 16118 transitions. [2022-11-20 10:38:26,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:26,763 INFO L276 IsEmpty]: Start isEmpty. Operand 5787 states and 16118 transitions. [2022-11-20 10:38:26,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:38:26,763 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:26,763 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:38:26,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 10:38:26,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1350677207, now seen corresponding path program 1 times [2022-11-20 10:38:26,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:26,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583206934] [2022-11-20 10:38:26,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:26,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:26,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:26,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583206934] [2022-11-20 10:38:26,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583206934] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:26,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726524153] [2022-11-20 10:38:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:26,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:26,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:26,857 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:26,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:38:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:26,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:38:26,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:26,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:38:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:27,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:27,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726524153] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:27,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:27,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-20 10:38:27,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278679115] [2022-11-20 10:38:27,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:27,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:38:27,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:27,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:38:27,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:38:27,116 INFO L87 Difference]: Start difference. First operand 5787 states and 16118 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:27,396 INFO L93 Difference]: Finished difference Result 5250 states and 14768 transitions. [2022-11-20 10:38:27,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 10:38:27,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:38:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:27,455 INFO L225 Difference]: With dead ends: 5250 [2022-11-20 10:38:27,456 INFO L226 Difference]: Without dead ends: 5250 [2022-11-20 10:38:27,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:38:27,457 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 183 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:27,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 49 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:38:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5250 states. [2022-11-20 10:38:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5250 to 5250. [2022-11-20 10:38:27,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5250 states, 4957 states have (on average 2.979221303207585) internal successors, (14768), 5249 states have internal predecessors, (14768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5250 states to 5250 states and 14768 transitions. [2022-11-20 10:38:27,630 INFO L78 Accepts]: Start accepts. Automaton has 5250 states and 14768 transitions. Word has length 6 [2022-11-20 10:38:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:27,630 INFO L495 AbstractCegarLoop]: Abstraction has 5250 states and 14768 transitions. [2022-11-20 10:38:27,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:27,630 INFO L276 IsEmpty]: Start isEmpty. Operand 5250 states and 14768 transitions. [2022-11-20 10:38:27,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:38:27,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:27,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:38:27,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:27,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:38:27,838 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:27,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:27,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1350462221, now seen corresponding path program 1 times [2022-11-20 10:38:27,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:27,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898641340] [2022-11-20 10:38:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:27,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:27,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:27,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898641340] [2022-11-20 10:38:27,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898641340] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:27,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:27,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:27,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309394571] [2022-11-20 10:38:27,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:27,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:27,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:27,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:27,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:27,982 INFO L87 Difference]: Start difference. First operand 5250 states and 14768 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:28,116 INFO L93 Difference]: Finished difference Result 4154 states and 11620 transitions. [2022-11-20 10:38:28,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:28,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:38:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:28,133 INFO L225 Difference]: With dead ends: 4154 [2022-11-20 10:38:28,133 INFO L226 Difference]: Without dead ends: 4154 [2022-11-20 10:38:28,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:28,134 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:28,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 11 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2022-11-20 10:38:28,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 4154. [2022-11-20 10:38:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4154 states, 4005 states have (on average 2.9013732833957553) internal successors, (11620), 4153 states have internal predecessors, (11620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4154 states to 4154 states and 11620 transitions. [2022-11-20 10:38:28,250 INFO L78 Accepts]: Start accepts. Automaton has 4154 states and 11620 transitions. Word has length 6 [2022-11-20 10:38:28,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:28,250 INFO L495 AbstractCegarLoop]: Abstraction has 4154 states and 11620 transitions. [2022-11-20 10:38:28,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4154 states and 11620 transitions. [2022-11-20 10:38:28,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:38:28,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:28,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:28,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:38:28,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:28,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:28,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1085339980, now seen corresponding path program 1 times [2022-11-20 10:38:28,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:28,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535156947] [2022-11-20 10:38:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:28,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:28,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:28,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535156947] [2022-11-20 10:38:28,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535156947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:28,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:28,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:28,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648467112] [2022-11-20 10:38:28,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:28,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:28,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:28,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:28,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:28,327 INFO L87 Difference]: Start difference. First operand 4154 states and 11620 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:28,497 INFO L93 Difference]: Finished difference Result 3249 states and 8545 transitions. [2022-11-20 10:38:28,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:28,498 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:38:28,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:28,510 INFO L225 Difference]: With dead ends: 3249 [2022-11-20 10:38:28,510 INFO L226 Difference]: Without dead ends: 3130 [2022-11-20 10:38:28,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:38:28,511 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:28,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 22 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:28,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3130 states. [2022-11-20 10:38:28,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3130 to 3040. [2022-11-20 10:38:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3040 states, 2987 states have (on average 2.6759290257783728) internal successors, (7993), 3039 states have internal predecessors, (7993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3040 states to 3040 states and 7993 transitions. [2022-11-20 10:38:28,638 INFO L78 Accepts]: Start accepts. Automaton has 3040 states and 7993 transitions. Word has length 7 [2022-11-20 10:38:28,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:28,638 INFO L495 AbstractCegarLoop]: Abstraction has 3040 states and 7993 transitions. [2022-11-20 10:38:28,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:28,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3040 states and 7993 transitions. [2022-11-20 10:38:28,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:38:28,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:28,641 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 10:38:28,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:38:28,641 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2022-11-20 10:38:28,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:28,642 INFO L85 PathProgramCache]: Analyzing trace with hash 488711272, now seen corresponding path program 1 times [2022-11-20 10:38:28,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:28,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073613824] [2022-11-20 10:38:28,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:28,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:28,662 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:38:28,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:38:28,689 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:38:28,690 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:38:28,690 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2022-11-20 10:38:28,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 31 remaining) [2022-11-20 10:38:28,690 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 31 remaining) [2022-11-20 10:38:28,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 31 remaining) [2022-11-20 10:38:28,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 31 remaining) [2022-11-20 10:38:28,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (25 of 31 remaining) [2022-11-20 10:38:28,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 31 remaining) [2022-11-20 10:38:28,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 31 remaining) [2022-11-20 10:38:28,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 31 remaining) [2022-11-20 10:38:28,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 31 remaining) [2022-11-20 10:38:28,693 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 31 remaining) [2022-11-20 10:38:28,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 31 remaining) [2022-11-20 10:38:28,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 31 remaining) [2022-11-20 10:38:28,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 31 remaining) [2022-11-20 10:38:28,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 31 remaining) [2022-11-20 10:38:28,694 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 31 remaining) [2022-11-20 10:38:28,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 31 remaining) [2022-11-20 10:38:28,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 31 remaining) [2022-11-20 10:38:28,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 31 remaining) [2022-11-20 10:38:28,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 31 remaining) [2022-11-20 10:38:28,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 31 remaining) [2022-11-20 10:38:28,695 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 31 remaining) [2022-11-20 10:38:28,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 31 remaining) [2022-11-20 10:38:28,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 31 remaining) [2022-11-20 10:38:28,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 31 remaining) [2022-11-20 10:38:28,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 31 remaining) [2022-11-20 10:38:28,696 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 31 remaining) [2022-11-20 10:38:28,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 31 remaining) [2022-11-20 10:38:28,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 31 remaining) [2022-11-20 10:38:28,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 31 remaining) [2022-11-20 10:38:28,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 31 remaining) [2022-11-20 10:38:28,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:38:28,698 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-11-20 10:38:28,699 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:38:28,699 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 10:38:28,737 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:38:28,739 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 10:38:28,739 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 189 places, 204 transitions, 429 flow [2022-11-20 10:38:28,740 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 189 places, 204 transitions, 429 flow [2022-11-20 10:38:28,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 189 places, 204 transitions, 429 flow [2022-11-20 10:38:28,821 INFO L130 PetriNetUnfolder]: 34/337 cut-off events. [2022-11-20 10:38:28,821 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-20 10:38:28,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 353 conditions, 337 events. 34/337 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1245 event pairs, 0 based on Foata normal form. 0/251 useless extension candidates. Maximal degree in co-relation 254. Up to 8 conditions per place. [2022-11-20 10:38:28,841 INFO L119 LiptonReduction]: Number of co-enabled transitions 21120 [2022-11-20 10:38:34,466 INFO L134 LiptonReduction]: Checked pairs total: 55060 [2022-11-20 10:38:34,467 INFO L136 LiptonReduction]: Total number of compositions: 190 [2022-11-20 10:38:34,468 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 99 transitions, 219 flow [2022-11-20 10:38:39,650 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 151152 states, 144687 states have (on average 5.016539150027301) internal successors, (725828), 151151 states have internal predecessors, (725828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:39,662 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:38:39,663 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3d69d44e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:38:39,663 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-20 10:38:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand has 151152 states, 144687 states have (on average 5.016539150027301) internal successors, (725828), 151151 states have internal predecessors, (725828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:39,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:38:39,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:39,901 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:38:39,902 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 10:38:39,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:39,903 INFO L85 PathProgramCache]: Analyzing trace with hash 40278, now seen corresponding path program 1 times [2022-11-20 10:38:39,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:39,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078918030] [2022-11-20 10:38:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:39,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:39,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:39,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078918030] [2022-11-20 10:38:39,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078918030] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:39,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:39,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:38:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51869469] [2022-11-20 10:38:39,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:39,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:39,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:39,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:40,580 INFO L87 Difference]: Start difference. First operand has 151152 states, 144687 states have (on average 5.016539150027301) internal successors, (725828), 151151 states have internal predecessors, (725828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:42,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:42,722 INFO L93 Difference]: Finished difference Result 110791 states and 413078 transitions. [2022-11-20 10:38:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:42,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:38:42,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:44,251 INFO L225 Difference]: With dead ends: 110791 [2022-11-20 10:38:44,251 INFO L226 Difference]: Without dead ends: 110755 [2022-11-20 10:38:44,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:44,253 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:44,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110755 states. [2022-11-20 10:38:48,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110755 to 110755. [2022-11-20 10:38:48,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110755 states, 107621 states have (on average 3.8370392395536186) internal successors, (412946), 110754 states have internal predecessors, (412946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110755 states to 110755 states and 412946 transitions. [2022-11-20 10:38:50,178 INFO L78 Accepts]: Start accepts. Automaton has 110755 states and 412946 transitions. Word has length 2 [2022-11-20 10:38:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:50,178 INFO L495 AbstractCegarLoop]: Abstraction has 110755 states and 412946 transitions. [2022-11-20 10:38:50,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 110755 states and 412946 transitions. [2022-11-20 10:38:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-20 10:38:50,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:50,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-20 10:38:50,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 10:38:50,179 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 10:38:50,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:50,179 INFO L85 PathProgramCache]: Analyzing trace with hash 40279, now seen corresponding path program 1 times [2022-11-20 10:38:50,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:50,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052793505] [2022-11-20 10:38:50,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:50,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:50,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:50,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052793505] [2022-11-20 10:38:50,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052793505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:50,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:50,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:38:50,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228665181] [2022-11-20 10:38:50,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:50,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:50,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:50,216 INFO L87 Difference]: Start difference. First operand 110755 states and 412946 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:51,962 INFO L93 Difference]: Finished difference Result 104580 states and 389618 transitions. [2022-11-20 10:38:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:51,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-20 10:38:51,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:52,548 INFO L225 Difference]: With dead ends: 104580 [2022-11-20 10:38:52,548 INFO L226 Difference]: Without dead ends: 104580 [2022-11-20 10:38:52,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:52,549 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:52,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 15 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:53,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104580 states. [2022-11-20 10:38:56,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104580 to 104580. [2022-11-20 10:38:56,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104580 states, 101846 states have (on average 3.825560159456434) internal successors, (389618), 104579 states have internal predecessors, (389618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:56,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104580 states to 104580 states and 389618 transitions. [2022-11-20 10:38:56,952 INFO L78 Accepts]: Start accepts. Automaton has 104580 states and 389618 transitions. Word has length 2 [2022-11-20 10:38:56,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:56,953 INFO L495 AbstractCegarLoop]: Abstraction has 104580 states and 389618 transitions. [2022-11-20 10:38:56,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:56,953 INFO L276 IsEmpty]: Start isEmpty. Operand 104580 states and 389618 transitions. [2022-11-20 10:38:56,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:38:56,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:56,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:38:56,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 10:38:56,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 10:38:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:56,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1425913050, now seen corresponding path program 1 times [2022-11-20 10:38:56,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:56,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356224201] [2022-11-20 10:38:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:56,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:57,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:57,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356224201] [2022-11-20 10:38:57,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356224201] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:57,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:57,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:38:57,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888484921] [2022-11-20 10:38:57,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:57,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:38:57,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:38:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:57,108 INFO L87 Difference]: Start difference. First operand 104580 states and 389618 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:38:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:58,884 INFO L93 Difference]: Finished difference Result 73948 states and 273510 transitions. [2022-11-20 10:38:58,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:38:58,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:38:58,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:59,320 INFO L225 Difference]: With dead ends: 73948 [2022-11-20 10:38:59,320 INFO L226 Difference]: Without dead ends: 73948 [2022-11-20 10:38:59,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:38:59,321 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 165 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:59,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 15 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:38:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73948 states. [2022-11-20 10:39:02,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73948 to 73948. [2022-11-20 10:39:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73948 states, 72896 states have (on average 3.752057726075505) internal successors, (273510), 73947 states have internal predecessors, (273510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:02,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73948 states to 73948 states and 273510 transitions. [2022-11-20 10:39:02,617 INFO L78 Accepts]: Start accepts. Automaton has 73948 states and 273510 transitions. Word has length 6 [2022-11-20 10:39:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:02,618 INFO L495 AbstractCegarLoop]: Abstraction has 73948 states and 273510 transitions. [2022-11-20 10:39:02,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 73948 states and 273510 transitions. [2022-11-20 10:39:02,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:39:02,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:02,619 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:39:02,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 10:39:02,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 10:39:02,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:02,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1426196784, now seen corresponding path program 1 times [2022-11-20 10:39:02,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:02,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169561086] [2022-11-20 10:39:02,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:02,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:02,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:02,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:02,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169561086] [2022-11-20 10:39:02,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169561086] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:02,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2771309] [2022-11-20 10:39:02,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:02,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:02,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:02,747 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:02,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:39:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:02,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:39:02,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:02,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 10:39:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:02,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:02,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2771309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:02,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:02,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-20 10:39:02,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128568418] [2022-11-20 10:39:02,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:02,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:39:02,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:02,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:39:02,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:39:02,925 INFO L87 Difference]: Start difference. First operand 73948 states and 273510 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:03,702 INFO L93 Difference]: Finished difference Result 69407 states and 256792 transitions. [2022-11-20 10:39:03,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:39:03,703 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:39:03,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:04,919 INFO L225 Difference]: With dead ends: 69407 [2022-11-20 10:39:04,919 INFO L226 Difference]: Without dead ends: 69407 [2022-11-20 10:39:04,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:39:04,920 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 234 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:04,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 76 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:39:05,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69407 states. [2022-11-20 10:39:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69407 to 69407. [2022-11-20 10:39:07,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69407 states, 68534 states have (on average 3.7469285318236203) internal successors, (256792), 69406 states have internal predecessors, (256792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69407 states to 69407 states and 256792 transitions. [2022-11-20 10:39:07,666 INFO L78 Accepts]: Start accepts. Automaton has 69407 states and 256792 transitions. Word has length 6 [2022-11-20 10:39:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:07,667 INFO L495 AbstractCegarLoop]: Abstraction has 69407 states and 256792 transitions. [2022-11-20 10:39:07,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:07,667 INFO L276 IsEmpty]: Start isEmpty. Operand 69407 states and 256792 transitions. [2022-11-20 10:39:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:39:07,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:07,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:07,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:07,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:07,872 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 10:39:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1253634903, now seen corresponding path program 1 times [2022-11-20 10:39:07,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:07,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955490389] [2022-11-20 10:39:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:07,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:07,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:07,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955490389] [2022-11-20 10:39:07,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955490389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:39:07,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:39:07,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:39:07,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547290975] [2022-11-20 10:39:07,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:39:07,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 10:39:07,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:07,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 10:39:07,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 10:39:07,964 INFO L87 Difference]: Start difference. First operand 69407 states and 256792 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:09,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:09,261 INFO L93 Difference]: Finished difference Result 48555 states and 165265 transitions. [2022-11-20 10:39:09,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 10:39:09,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:39:09,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:09,646 INFO L225 Difference]: With dead ends: 48555 [2022-11-20 10:39:09,647 INFO L226 Difference]: Without dead ends: 46799 [2022-11-20 10:39:09,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 10:39:09,648 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:09,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 30 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:39:09,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46799 states. [2022-11-20 10:39:10,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46799 to 45899. [2022-11-20 10:39:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45899 states, 45594 states have (on average 3.41134798438391) internal successors, (155537), 45898 states have internal predecessors, (155537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:11,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45899 states to 45899 states and 155537 transitions. [2022-11-20 10:39:11,606 INFO L78 Accepts]: Start accepts. Automaton has 45899 states and 155537 transitions. Word has length 7 [2022-11-20 10:39:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:11,606 INFO L495 AbstractCegarLoop]: Abstraction has 45899 states and 155537 transitions. [2022-11-20 10:39:11,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 45899 states and 155537 transitions. [2022-11-20 10:39:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 10:39:11,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:11,608 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2022-11-20 10:39:11,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 10:39:11,609 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 10:39:11,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash 259032526, now seen corresponding path program 1 times [2022-11-20 10:39:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:11,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119536372] [2022-11-20 10:39:11,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:11,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:11,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:39:11,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119536372] [2022-11-20 10:39:11,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119536372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:39:11,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389314896] [2022-11-20 10:39:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:11,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:39:11,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:39:11,657 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:39:11,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:39:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:39:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-20 10:39:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:39:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:11,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:39:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:39:11,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389314896] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:39:11,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:39:11,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-20 10:39:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313183604] [2022-11-20 10:39:11,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:39:11,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:39:11,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:39:11,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:39:11,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:39:11,821 INFO L87 Difference]: Start difference. First operand 45899 states and 155537 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:12,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:39:12,020 INFO L93 Difference]: Finished difference Result 9267 states and 32399 transitions. [2022-11-20 10:39:12,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:39:12,021 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-20 10:39:12,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:39:12,049 INFO L225 Difference]: With dead ends: 9267 [2022-11-20 10:39:12,049 INFO L226 Difference]: Without dead ends: 9267 [2022-11-20 10:39:12,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:39:12,049 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 155 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:39:12,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 41 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:39:12,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9267 states. [2022-11-20 10:39:12,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9267 to 9267. [2022-11-20 10:39:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9267 states, 9266 states have (on average 3.496546514137708) internal successors, (32399), 9266 states have internal predecessors, (32399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:12,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 32399 transitions. [2022-11-20 10:39:12,250 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 32399 transitions. Word has length 11 [2022-11-20 10:39:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:39:12,251 INFO L495 AbstractCegarLoop]: Abstraction has 9267 states and 32399 transitions. [2022-11-20 10:39:12,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:39:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 32399 transitions. [2022-11-20 10:39:12,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 10:39:12,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:39:12,253 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-20 10:39:12,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:39:12,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1adb4adb-1a88-481c-a708-cdcd2c9f075c/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-20 10:39:12,458 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-20 10:39:12,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:39:12,458 INFO L85 PathProgramCache]: Analyzing trace with hash -122046545, now seen corresponding path program 1 times [2022-11-20 10:39:12,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:39:12,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987564371] [2022-11-20 10:39:12,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:39:12,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:39:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:39:12,474 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:39:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:39:12,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:39:12,488 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:39:12,488 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-11-20 10:39:12,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2022-11-20 10:39:12,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-11-20 10:39:12,488 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-11-20 10:39:12,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-11-20 10:39:12,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (33 of 39 remaining) [2022-11-20 10:39:12,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (32 of 39 remaining) [2022-11-20 10:39:12,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-11-20 10:39:12,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-11-20 10:39:12,489 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2022-11-20 10:39:12,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-11-20 10:39:12,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2022-11-20 10:39:12,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-11-20 10:39:12,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-11-20 10:39:12,490 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-11-20 10:39:12,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-11-20 10:39:12,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 39 remaining) [2022-11-20 10:39:12,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-11-20 10:39:12,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-11-20 10:39:12,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-11-20 10:39:12,491 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-11-20 10:39:12,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-11-20 10:39:12,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-11-20 10:39:12,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-11-20 10:39:12,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-11-20 10:39:12,492 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-11-20 10:39:12,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-11-20 10:39:12,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 39 remaining) [2022-11-20 10:39:12,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-11-20 10:39:12,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-11-20 10:39:12,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-11-20 10:39:12,493 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-11-20 10:39:12,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-11-20 10:39:12,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-11-20 10:39:12,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-11-20 10:39:12,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-11-20 10:39:12,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-11-20 10:39:12,494 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-11-20 10:39:12,495 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 39 remaining) [2022-11-20 10:39:12,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-20 10:39:12,495 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:39:12,496 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 10:39:12,496 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 10:39:12,520 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:39:12,523 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 10:39:12,523 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 245 transitions, 522 flow [2022-11-20 10:39:12,524 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 245 transitions, 522 flow [2022-11-20 10:39:12,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 245 transitions, 522 flow [2022-11-20 10:39:12,595 INFO L130 PetriNetUnfolder]: 44/424 cut-off events. [2022-11-20 10:39:12,596 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-20 10:39:12,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 424 events. 44/424 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1631 event pairs, 0 based on Foata normal form. 0/313 useless extension candidates. Maximal degree in co-relation 345. Up to 10 conditions per place. [2022-11-20 10:39:12,619 INFO L119 LiptonReduction]: Number of co-enabled transitions 34720 [2022-11-20 10:39:19,009 INFO L134 LiptonReduction]: Checked pairs total: 93202 [2022-11-20 10:39:19,010 INFO L136 LiptonReduction]: Total number of compositions: 225 [2022-11-20 10:39:19,011 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 107 places, 125 transitions, 282 flow